 /* 为GridPane面板组件根元素添加背景图片 */
 .root {
      -fx-background-image: url("../img/login/background.jpg");
      -fx-background-repeat: no-repeat;
      -fx-background-size: 530 410;
      -fx-background-position: center center;
 }
 /* 为label标签组件设置大小、颜色、展示效果 */
 .label {
     -fx-font-size: 16px;
     -fx-text-fill: #333333;
     -fx-effect: dropshadow( gaussian , rgba(255,255,255,0.5) , 0,0,0,1 );
 }
 /* 为id为welcomeText的组件设置大小、字体、颜色、展示效果 */
 #welcomeText {
    -fx-font-size: 32px;
    -fx-font-family: "Arial Black";
    -fx-position: center;
    -fx-fill: #818181;
    -fx-effect: innershadow( three-pass-box ,rgba(0,0,0,0.7),6, 0.0 , 0 , 2 );
 }
 /* 为id为actiontarget的组件设置大小、颜色、展示效果 */
 #actiontarget {
   -fx-fill: FIREBRICK;
   -fx-font-weight: bold;
   -fx-effect: dropshadow( gaussian , rgba(255,255,255,0.5) , 0,0,0,1 );
 }
 /* 为button标签组件设置大小、颜色、展示效果 */
 .button {
     -fx-text-fill: white;
     -fx-font-family: "Arial Narrow";
     -fx-font-weight: bold;
     -fx-background-color: linear-gradient(#61a2b1, #2A5058);
     -fx-effect: dropshadow( three-pass-box ,rgba(0,0,0,0.6),5, 0.0 , 0 , 1 );
 }
 /* 设置当鼠标移到button按钮时的大小、颜色、展示效果 */
 .button:hover {
     -fx-background-color: linear-gradient(#2A5058, #61a2b1);
 }